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be7825c1 KS |
1 | #ifndef _ASM_X86_INTEL_PCONFIG_H |
2 | #define _ASM_X86_INTEL_PCONFIG_H | |
3 | ||
4 | #include <asm/asm.h> | |
5 | #include <asm/processor.h> | |
6 | ||
7 | enum pconfig_target { | |
8 | INVALID_TARGET = 0, | |
9 | MKTME_TARGET = 1, | |
10 | PCONFIG_TARGET_NR | |
11 | }; | |
12 | ||
13 | int pconfig_target_supported(enum pconfig_target target); | |
14 | ||
24c51785 KS |
15 | enum pconfig_leaf { |
16 | MKTME_KEY_PROGRAM = 0, | |
17 | PCONFIG_LEAF_INVALID, | |
18 | }; | |
19 | ||
20 | #define PCONFIG ".byte 0x0f, 0x01, 0xc5" | |
21 | ||
22 | /* Defines and structure for MKTME_KEY_PROGRAM of PCONFIG instruction */ | |
23 | ||
24 | /* mktme_key_program::keyid_ctrl COMMAND, bits [7:0] */ | |
25 | #define MKTME_KEYID_SET_KEY_DIRECT 0 | |
26 | #define MKTME_KEYID_SET_KEY_RANDOM 1 | |
27 | #define MKTME_KEYID_CLEAR_KEY 2 | |
28 | #define MKTME_KEYID_NO_ENCRYPT 3 | |
29 | ||
30 | /* mktme_key_program::keyid_ctrl ENC_ALG, bits [23:8] */ | |
31 | #define MKTME_AES_XTS_128 (1 << 8) | |
32 | ||
33 | /* Return codes from the PCONFIG MKTME_KEY_PROGRAM */ | |
34 | #define MKTME_PROG_SUCCESS 0 | |
35 | #define MKTME_INVALID_PROG_CMD 1 | |
36 | #define MKTME_ENTROPY_ERROR 2 | |
37 | #define MKTME_INVALID_KEYID 3 | |
38 | #define MKTME_INVALID_ENC_ALG 4 | |
39 | #define MKTME_DEVICE_BUSY 5 | |
40 | ||
d9f6e12f | 41 | /* Hardware requires the structure to be 256 byte aligned. Otherwise #GP(0). */ |
24c51785 KS |
42 | struct mktme_key_program { |
43 | u16 keyid; | |
44 | u32 keyid_ctrl; | |
45 | u8 __rsvd[58]; | |
46 | u8 key_field_1[64]; | |
47 | u8 key_field_2[64]; | |
48 | } __packed __aligned(256); | |
49 | ||
50 | static inline int mktme_key_program(struct mktme_key_program *key_program) | |
51 | { | |
52 | unsigned long rax = MKTME_KEY_PROGRAM; | |
53 | ||
54 | if (!pconfig_target_supported(MKTME_TARGET)) | |
55 | return -ENXIO; | |
56 | ||
57 | asm volatile(PCONFIG | |
58 | : "=a" (rax), "=b" (key_program) | |
59 | : "0" (rax), "1" (key_program) | |
60 | : "memory", "cc"); | |
61 | ||
62 | return rax; | |
63 | } | |
64 | ||
be7825c1 | 65 | #endif /* _ASM_X86_INTEL_PCONFIG_H */ |